Telephone system.



No. 891,786. 'PATENTED JUNE 23, 1908.

- N. H. SU REN,

TELEPHONE SYSTEM. APPLICATION FILED MAR. 16, 1806.

' 2 SHEETS-SHEET 1.

Attorneys.

No. 891,786. V PATENTED JUNE 28, 1908. N. H. SURBN.

TELEPHONE SYSTEM.

APPLICATION FILED MAR. 16, 1906- 2 SHEETS-SHEET 2.

Witnesses Y Inventor A ttorneys.

- "UNIT D STATES PATENT OFFICE.

NATHAN H. SUREN, OF HIGHLANDVILLE, MASSACHUSETTS, ASSIGNOR TO THE GAMEWELL FIRE ALARM TELEGRAPHOOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

TELEPHONE SYSTEM.

Patented June 23, 1908.

Application m c March 16, 1906. Serial No, 306,320.

To all whom it may concern:

Be it known that I, NATHAN H. SUREN, a

citizen-of the United States, residing at Hi hlandville, county of Norfolk, and State of Tiassachusetts, have invented a certain new and useful Telephone System, of which the following is a descri tion.

The object I haveinvlew is the production of a telephone system employing closed call boxes, particularly those used in tunnels or such places where dampness is present, and in which it is desirable and necessary to kee the inside of the boxes dry. This object 1s attained by placing within each of the boxes cuits, and Fig. 2 shows a view, on a somewhat lar er scale, of a modified form of box.

In bot of the views, like parts are designated by the same reference characters.

In Fig. 1, the character. 1 represents a call box having a cover, such as 2. The callbox to the left in the drawing is shown as open,

having its cover removed for clearness of illustration of the interior. Within each call box is a heater 3. This heater is preferably an electric heater, and may be in the form of a coil, or laminated plates.- In the embodiment illustrated, it is connected with the mains 4 from the generator 5. In connection with each box I may use a signal, for indicating that the box had been called, such signal preferably consisting of a lamp 6 located outside of the box. W1th this lamp is used a device for switching it in. -As

shown in the drawing, this deviceconsists of a switch 7, which 1s pivoted at 8 It is moved by means of a spring 9., when released by a hook on the armature 10. This armature is actuated by magnets 11, which are in "the telephone circuit 1213. I As shown in the dra'win the lamp is arranged in multiple with t e heater, but the electric arrangpment may be varied, if desired. Within t ebex is'shown a telephone 14, and in connection with this, an annunciator switch 15 for completing a second circuit through the wires 1216.' This latter is for service when it is desirable to send a call signal from the box.

In use as many boxes as may be desired may be laced in the tunnel, or other loca tion, and connected with the mains 4, and the telephone and annunciator wires. The heating coils 3 being constantly in circuit} Will keep the interior of each box warm, and will therefore evaporate and drive 0 all moisture, protecting the other parts of the apparatus from injury. In operation, as soon as a signal is received by the box, the armature 10 will be attracted to the magnet 11, and the switch 7 tripped, whereupon it will connect with the plate 17 and the circuit through the lamp 6 will be completed.

Attention thereby being directed to the box by the illumination of the lamp, the call can be answered by opening the door of the box, and using the telephone. The switch 7 may be returned to its place by hand, or by a simple mechanical connection with the door,

so that when the door is closed, this switch will be returned to place.

In Fig. 2 the box is shown with the addi 7 tion of an audible signal. In this embodiment of the invention, the bell or gong 17 is located on the outside of the door or cover 2. The actuating mechanism 18 is located inside of the box, and is so arranged that it will ring the bell or sound the gong when current passes through the circuit, which includes the wires 19 and 20. These two wires connect with a 3- oint switch 21, having "a central moving e astic member which normally contacts with that member of the switch that connects with the wire 20. The third member connects with the wire 22,. and to the magnets 11. The central member connects with the wire 23 through the receiver concuit will be completed through the switch 15,

the wires 23, 22' and magnet 11, and back through the wire 13. The magnet 11 being 15 Patent is:

5 switch 21, permitting it to contact with the end member, which is in communication with the wire 20. The circuit will be completed through the bell actuating mechanism 18, the circuit including the wires 19, 20, and 23.

The bell will ring and continue to ring so long as the circuit is kept closed by the person sending the signal.

Having described my invention, what- I claim is new and desire to secure by Letters 1. In a signal system, the combination with a lighting circuit including-a lamp, and a telephone circuit including a telephone, of a box, the telephone being inside of the box,

2:0 means within the box for'aiiecting the lamp,

and a drying device within the box, the said drying device being in the form of a resistance 1n multiple with the lamp and within the. lighting circuit, and'receiving current ,25 therefrom.

2. In a signal box, the combination with a v light circuit including a lamp,'and a telephone circuit'including a magnet, an arma-, ture adapted to be actuated by the magnet and having a book, a switch engaged by the hook and adapted to complete the circuit throu h the lam and a heatin coil connecte to the light circuit in mu, tiple with the lamp, the said coil being constantly in circuit and the lamp beingput in circuit by the energizing of the magnet.

3. In a signal box, the combination with a light circuit including a lamp, and a telephone circuit including a magnet, an armatu're adapted to be actuated by the ma net and having a hook, the switch enga e by the hook, and adapted to complete 51c circuit through the lamp, and a heating device connected to the light circuit in multiple with the lamp, said heatin device being constantly in circuit and the amp being put in circuit by the ener izing of the magnet, and

the 3-point switch aving a central member,

in engagement with the switch actuating the lamp, and a bell in circuit with the swltch, the said bell actuating mechanism being inside the'box and the bell outside. v This specification signed and witnessed this 12th day of March, 1906.

NATHAN H. SUREN, Witnesses; i

A. J. KNORING, EDWARD J. COLEMAN. 

